Although this is supposed to be 'sweet-scented,' I was unable to discern much scent at all. To be fair, it is about 60 degrees outside and perhaps the flower needs to have some warmth and sunshine to be smelly. And it's kind of drizzly as well.
According to the description it can bloom all summer, so I'm curious why I didn't see it last year... not old enough? Some descriptions say it takes seven years to establish itself. Master Gardeners are invited to comment.